With Kontact you can manage POP, IMAP... AND all the information in your online email accounts (like GMail). You can centralize everything in one powerful application because Kontact supports it all: email, contact information, calendars, tasks, and more.

Have you ever seen anyone with a connection to Microsoft use the term #FOSS rather than OSS, or open source software? They've been remarkably successful in killing the "freedom" aspect of FOSS, which, in my opinion, is the most crucial aspect by far. Saddens me that many people fail to notice this.